package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexPatterns;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        // 1 校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        // 2 随机生成验证码
        String code = RandomUtil.randomNumbers(6);
        // 3 保存结果在session
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone, code,LOGIN_CODE_TTL, TimeUnit.MINUTES);
//        session.setAttribute("code", code);
        // 发送验证溤
        log.info("发送短信验证码成功:{}", code);
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {

        String phone = loginForm.getPhone();
        // 校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        String code = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String code1 = loginForm.getCode(); //
        // 对比验证码
        if (code == null || !code.equals(code1)) {
            return Result.fail("验证码错误");
        }
        // 查询数据库 查看具体的密码
        User user = query().eq("phone", phone).one();
        // 如果用户不存在 就创建用户
        if (user == null) {
            user = new User();
            user.setPhone(phone);
            user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
            save(user);
        }

        // 成功后存入Redis中
        String token = UUID.randomUUID().toString(true);
        // 将user对象转换为hash存储
        UserDTO userDTO = new UserDTO();
        BeanUtils.copyProperties(user, userDTO);

        Map<String, Object> stringObjectMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create().setIgnoreNullValue(true).setFieldValueEditor((filedName ,filedValue)-> filedValue.toString()));//    BeanUtil.beanToMap 将UserDTO转换为Map结构
        // 只转换id字段为String类型
//        if (stringObjectMap.get("id") != null) {
//            stringObjectMap.put("id", stringObjectMap.get("id").toString());
//        }
        // 存储
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY + token, stringObjectMap);
        // 设置token有效期
        stringRedisTemplate.expire(LOGIN_USER_KEY + token, LOGIN_USER_TTL, TimeUnit.MINUTES);
        // 返回token
        return Result.ok(token);
    }
}
